How many digits are in the number N? We can solve this by counting the rightmost digit and removing it, continuing until all digits have been removed so that n is 0. A post-test loop is used because N = 0 has 1 digit. To remove one digit of N you can use integer division of N/10, which can be implemented in matlab with the function iderive(N,10). Using as source of inspiration the code below, write a function to compute the number of digits in a number. Testing with N=345, the result should be 3 digits.

code in matlab